Quick Answer

To connect Sony ULT Wear (WH-ULT900N) headphones, turn them on, hold the Power button for about seven seconds until pairing mode starts, then select WH-ULT900N in your phone or laptop’s Bluetooth settings. For extra controls, install the Sony | Sound Connect app. If pairing fails, remove the old Bluetooth entry and reset the headphones.

Step-by-Step Instructions

1. Charge and prepare the headphones

Before pairing, charge the Sony ULT Wear headphones using the supplied USB cable or a compatible USB-C charger. Pairing can fail or disconnect repeatedly when the battery is critically low.

Also check the following:

– Keep the headphones within a few feet of the phone or computer.

– Turn off Bluetooth on devices that were previously connected if you do not want the headphones to reconnect to them.

– Remove the headphones from their case or storage area and unfold them.

– Make sure the headphones are not connected to another nearby device.

The WH-ULT900N can remember multiple paired devices, but it normally attempts to reconnect to a device it has used recently. Temporarily disabling Bluetooth on those devices can make the first connection easier.

2. Put Sony ULT Wear into pairing mode

If the headphones have never been paired with a device, turn them on by pressing the Power button. They may automatically enter pairing mode.

For manual pairing:

  • Turn the headphones off if they are already powered on.
  • Press and hold the Power button for about seven seconds.
  • Continue holding the button until the indicator begins flashing blue and you hear the voice prompt “Bluetooth pairing.”

A short press turns the headphones on or off, while a longer press is required to enter pairing mode. If you release the button too early, the headphones may simply turn on without becoming discoverable.

Do not press the ULT button for pairing. The ULT button controls the headphones’ bass-enhancement sound modes.

3. Connect the headphones to an iPhone or Android phone

The phone’s Bluetooth menu is the simplest way to connect Sony ULT Wear headphones.

On an iPhone:

  • Open Settings.
  • Tap Bluetooth.
  • Turn Bluetooth on.
  • Wait for WH-ULT900N to appear under Other Devices.
  • Tap WH-ULT900N.
  • Approve the pairing request if one appears.

On an Android phone:

  • Open Settings.
  • Open Connected devices, Connections, or Bluetooth, depending on the phone model.
  • Turn Bluetooth on.
  • Tap Pair new device if necessary.
  • Select WH-ULT900N from the available devices.
  • Confirm the pairing request.

When pairing is complete, the headphones should appear as Connected. You may hear a voice confirmation through the headphones. If the phone requests a PIN, try 0000, although most current phones pair without requiring one.

After the first successful connection, pressing the Power button normally reconnects the headphones automatically when Bluetooth is enabled on the phone.

4. Connect Sony ULT Wear to a Windows laptop

To connect the WH-ULT900N to a Windows laptop:

  • Turn on the headphones and place them in pairing mode.
  • On the laptop, open Settings.
  • Select Bluetooth & devices.
  • Turn Bluetooth on.
  • Click Add device.
  • Choose Bluetooth.
  • Select WH-ULT900N.
  • Wait until Windows reports that the device is connected.

Windows may list the headphones as both an audio output and a microphone. To select them for sound:

  • Click the speaker icon on the Windows taskbar.
  • Open the output-device list.
  • Choose WH-ULT900N.

For video calls, open the meeting app’s audio settings and select WH-ULT900N as both the speaker and microphone if you want to use the headphones’ built-in mic.

If Windows shows separate options such as Headphones and Headset, choose Headphones for better music quality. The headset mode may be used automatically when an application needs microphone access.

5. Connect Sony ULT Wear to a Mac

To pair with macOS:

  • Put the headphones into Bluetooth pairing mode.
  • Open the Apple menu.
  • Select System Settings.
  • Click Bluetooth.
  • Find WH-ULT900N in the nearby devices list.
  • Click Connect.

After connecting, open System Settings > Sound and choose WH-ULT900N under the output device. If you need the headphone microphone for calls, select it under the input device as well.

If the Mac connects but continues playing sound through its internal speakers, manually select the headphones from the Control Center’s sound menu or from System Settings > Sound.

6. Install and set up the Sony | Sound Connect app

Sony’s headphone app was previously known as Sony | Headphones Connect. It may appear as Sony | Sound Connect in current app stores. The app is optional for basic Bluetooth audio, but it provides additional settings and firmware updates.

To use it:

  • Install Sony | Sound Connect from the Apple App Store or Google Play.
  • Turn on Bluetooth.
  • Open the app.
  • Follow the on-screen instructions to add the WH-ULT900N.
  • Allow any requested Bluetooth permissions.
  • Install a firmware update if the app offers one.

Depending on the app version, you can use it to adjust equalizer settings, control noise canceling and ambient sound, configure the ULT button, enable adaptive sound controls, check battery status, and manage multipoint connections.

Keep the headphones close to the phone while an update is installing. Do not turn them off or close the app during the update.

7. Enable multipoint for two devices

Multipoint lets the Sony ULT Wear headphones remain connected to two Bluetooth devices at the same time. For example, you can connect to a laptop for music and keep a phone connected for calls.

To enable it:

  • Pair the headphones with the first device.
  • Open the Sony | Sound Connect app.
  • Open the headphones’ settings.
  • Find the option labeled Connect to 2 devices simultaneously or a similar multipoint setting.
  • Turn the option on.
  • Follow the app’s instructions to connect the second device.

You may need to disconnect the headphones temporarily before the app can add the second device. If so:

  • Turn off Bluetooth on the first device, or disconnect WH-ULT900N from its Bluetooth menu.
  • Put the headphones into pairing mode.
  • Pair them with the second device.
  • Reconnect the first device.
  • Confirm that both devices appear as connected in the app or Bluetooth settings.

With multipoint active, audio generally plays from one device at a time. A phone call can interrupt laptop audio, but the headphones do not mix both audio streams together. Some devices or applications may also take control of the connection unexpectedly.

8. Switch between connected devices

When two devices are connected, pause audio on the current device before starting playback on the other one. If the second device does not take over:

  • Pause music, video, or calls on the first device.
  • Wait a few seconds.
  • Start audio on the second device.
  • Select WH-ULT900N as its active output if necessary.

For the most reliable behavior, keep only the devices you actually need connected. Multipoint can be convenient, but extra paired devices may make automatic reconnection less predictable.

Troubleshooting

The headphones do not appear in the Bluetooth list

Put the headphones into pairing mode again rather than merely turning them on. Turn them off, then hold the Power button for about seven seconds until the blue indicator flashes and the pairing prompt plays.

If they still do not appear:

– Turn Bluetooth off and back on on the phone or computer.

– Move the headphones closer to the device.

– Close the Sony | Sound Connect app temporarily and reopen it.

– Disable Bluetooth on previously connected phones, tablets, or laptops.

– Restart both the headphones and the device.

– Check that the headphones have sufficient battery power.

Avoid searching for the headphones while they are already connected to another nearby device. Disconnecting them there is often enough to make them visible.

The headphones appear but will not connect

The saved Bluetooth record may be corrupted or outdated. Remove the old connection and pair again.

On a phone, tap the information icon or settings icon beside WH-ULT900N, choose Forget This Device, Unpair, or Remove, and confirm. On Windows, go to Settings > Bluetooth & devices, open the menu beside the headphones, and choose Remove device. On a Mac, open Bluetooth settings and remove or forget the device.

Then restart Bluetooth, place the headphones into pairing mode, and select WH-ULT900N again.

If the headphones are connected to two devices through multipoint, disconnect one device before attempting to pair with a new one.

The headphones connect, but there is no sound

First, confirm that the headphones are selected as the output device. A Bluetooth connection does not always change the computer’s active audio output automatically.

Check these settings:

– On iPhone or Android, select the headphones from the audio output control.

– On Windows, select WH-ULT900N from the taskbar sound menu.

– On Mac, select WH-ULT900N in System Settings > Sound.

– Increase the volume on both the source device and the headphones.

– Pause and restart the media.

– Close and reopen the music or video application.

If only one application has a problem, inspect that application’s own audio-output settings. For calls, confirm that the application is using the headphones rather than the computer or phone speaker.

The connection keeps dropping

Bluetooth interference, distance, low battery, and multipoint activity can all cause dropouts. Keep the source device nearby and avoid placing it behind a metal object, inside a bag, or next to other wireless equipment.

You can also try:

  • Disconnecting unused Bluetooth accessories.
  • Turning multipoint off temporarily.
  • Updating the headphones through Sony | Sound Connect.
  • Restarting the source device.
  • Removing and pairing the headphones again.
  • Testing with another phone or computer.

If dropouts occur only in a crowded wireless environment, moving to another location may identify interference as the cause.

Multipoint will not work

Make sure Connect to 2 devices simultaneously is enabled in Sony | Sound Connect. Both devices must support standard Bluetooth audio, and the headphones must be paired with each device individually.

If the second device refuses to connect:

  • Disable Bluetooth on both source devices.
  • Turn the headphones off and on.
  • Enable Bluetooth on the first device and connect.
  • Enable Bluetooth on the second device and connect.
  • Recheck the multipoint setting in the app.

Some app versions require the second device to be added from inside the app rather than from the device’s normal Bluetooth menu. Follow the instructions displayed by the current app version.

Reset or initialize the headphones

A restart can clear a temporary software issue without deleting all pairing information. Turn the headphones off, wait several seconds, and turn them on again.

If normal troubleshooting does not help, use the WH-ULT900N initialization procedure described in Sony’s current support documentation or the product help guide. Initialization restores default settings and deletes Bluetooth pairing information, so you will need to pair the headphones again afterward.

Before initializing, install any available firmware update and remove the old Bluetooth entry from your phone or computer. If the headphones remain unresponsive or fail with several different devices, contact Sony support for model-specific service guidance.

FAQ

How do I put Sony ULT Wear headphones into pairing mode?

Turn the headphones off, then press and hold the Power button for about seven seconds. Release it when the blue indicator flashes and the voice prompt says “Bluetooth pairing.” Select WH-ULT900N from the Bluetooth menu on your phone, tablet, or computer.

Why is WH-ULT900N not showing on my phone?

The headphones may not be in pairing mode, or they may already be connected to another nearby device. Turn off Bluetooth on previously connected devices, restart Bluetooth on your phone, and hold the Power button for about seven seconds while the headphones are off.

Can Sony ULT Wear connect to a phone and laptop at the same time?

Yes. The WH-ULT900N supports multipoint connection to two devices. Enable Connect to 2 devices simultaneously in the Sony | Sound Connect app, then pair and connect the phone and laptop. Audio plays from one device at a time, while calls from the phone can interrupt laptop audio.

Do I need the Sony | Sound Connect app to pair the headphones?

No. You can pair the headphones directly through the Bluetooth settings on your phone or computer. The Sony | Sound Connect app is useful for firmware updates, equalizer controls, noise-control settings, ULT button customization, battery information, and multipoint configuration.

Final Tips

– Use the exact Bluetooth name WH-ULT900N when selecting the headphones.

– Hold the Power button long enough to enter pairing mode; a normal short press only turns the headphones on.

– Forget old Bluetooth entries when switching to a new phone or computer.

– Keep the headphones close to the source device during pairing and firmware updates.

– Use Sony | Sound Connect for firmware updates and multipoint settings.

– If connection problems continue, test the headphones with another device to determine whether the issue is with the headphones or the original source.

– After successful pairing, turn on the source device’s Bluetooth before powering on the headphones so they can reconnect automatically.